1. Division of Radiation of Radiation Oncology, University of Texas M.D. Anderson Cancer Center, Houston
2. Department of Radiation Oncology, University of Tennessee Health Sciences Center, Memphis
3. Department of Clinical Oncology and Nuclear Medicine, Alexandria University, Alexandria, Egypt
4. Division of Surgery, Department of Thoracic and Cardiovascular Surgery, University of Texas M.D. Anderson Cancer Center, Houston
5. Division of Surgery, Baptist M.D. Anderson Cancer Center, Jacksonville, Florida